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(No Model.) 4 SheetsSh.eet 1.

. G- W. HUBER.

MACHINE FOR GOMPRESSING POWDBRBD 0R GBANULAR SUBSTANCES. No. 593,100. Patented Nov. 2, 1897.

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(No Model.) Q 4 Sheets Sheet 2. G. W. HUBER. MACHINE ran comrnassme POWDBRED GR GRANULAR smzsnucss. No. 593,100. latented NOV. 2,.1897.

Flag.

Witnesses:

(N0 Modl.) 4 Sheets-Sheet a.

I G. W. HUBER. MACHINE FOR GOMPRESSING POWDERBD OR GRANULAR SUBSTANCES.

No. 593,100. Patented Nov. 2, 1 97.

In Vera/Ur.- Gear ye Wffuer UNITED STATES" Pnrn'r trio MnsNn ASSIGNMENTS, TO HORACE A.

KRAUSE, OF SAME PLACE.

EFFRIG AND THADDEUS S.

MACHINE FOR COMPRES SlNG-POWDERED OR GRANULAR SUBSTANCES,

SPECIFICATION forming an of was Patent No. 593,100, dated November 2, 1897.

' Applicatioh filed a, 25, 1896. Serial No. 592,968. on model.)

To all whom it mag concern:

Be it known that I, Gnonon W. H BER, a citizen of the United States, residing in Philadelphia, Pennsylvania,-have invented certain Improvements in Machines for Compressing Powdered or Granular Substances, of which the following is a specification.

The object of my invention is to provide for the use of druggists and others a cheap and simple but effective machine for compressing powdered or granular materials into the form of disks or tablets. This object I attain in the following manner, reference being had to the accompanying drawings, in which Figure 1 is. a .view, partly in section and partly in side elevation, of a machine constructed in accordance with. my invention, showing the parts in position for the reception of the powdered or granular material. Fig. 2 is ,a similar View showing the parts in position for compressing said material. Fig. 3 is a view, partly in plan or top view and partly in section, illustrating the parts of the machine in position for expelling the compressed tablet. Fig. is a sectional view, partly in elevation, of part of the machine, illustrating one of the features of construction of the same; and Figs. 5 and 6 are views, partly in section and partly in elevation, of the feeding device for the machine.

The base or bed plate of the machine is represented at 1, this base having a fiat top which serves for the support of a sliding plunger-head 2 and a sliding mold-head 3, said plunger-head having secured thereto a plunger 4i, and the mold-head having secured to it a tubular mold-block 5, to which fit snugly both the plunger 4 and another plunger 6, which has a stem 7, secured by means of a thumb-screw 8 in a post 9 atone end of the base or bed plate 1.

The sliding plungenhead 2 has a contracted forward end 10 and is forked at the rear end, so asto form opposite wings 11, which carry a transverse pin 12, and upon the latter is mounted an antifrictionmoller 13, which is adapted to a slot in a oan1-lever lat, hung to a transverse pin 15, which is carried by cheekpie ces ltiat the rear end of the base-plate, so that when the said lever 1a is moved from the position shown in Fig. 1 to that shown in Fig.-2 the plunger-head 2 will be projected, reverse movement of the lever eiiecting a retraction ofsaid plunger-head.

Screwing into athreaded opening in the base-plate is a set-screw 42, which serves as a stop to limit the descent of the operatingarm of the lever 14:, so as to regulate the approach of the plunger 4 toward the plunger 6 to accord with the desired size of the tablet to be produced, and in addition to this adjustable stop there is a fixed stop 43, which prevents such movement of the cam-lever 14 aswould'cause the plunger 4 to come into contact with and injure the plunger 6 when no charge of material was present between them.

The plungenhead 2 is contained between cheek-pieces 17 on the base-plate and is retained in position vertically by means of a transverse roller 18, carried by and free to turn in said cheek-pieces, but the plungerhead fits loosely between the cheek-pieces, the lateral position of said plunger-head being determined by means of set-screws 19, adapted to threaded openings in forward extensions 20 of the cheek-pieces 17, these setscrews being on the opposite sides of the contracted forward portion 10 of the plungerhead, so that accurate lateral adjustment of the plunger 4 in order to bring it into line with the tubular mold 5 can be readily effected.

The mold-head 3 has side arms 21, which flank the post 9, carrying the fixed plunger 6, the outer ends of said arms 21 having a transverse pin 22, which is adapted to a slot 23 in a curved lever 24, the latter being hung to a transverse pin 25, carried by projecting lugs 26 on the base-plate 1.

The mold-head 3 has an upwardly-projecting filling-hopper 27, which registers with the opening 28, formed in the upper side of the tubular mold 5, and mounted upon a standard 29 at one side of the machine is'a measuringdevice consisting of a tubular casing 30, supporting a receptacle for the pow- 81, having a projecting stem 32 with-operat ing-handle 33, the spindle being cut away at one side and having at said recessed side an adjustable slide 34, movable longitudinally on the spindle and adapted to be secured in position by means of a confining-screw 35,.

passing through a slot 36 in-said spindle, so that by longitudinal adjustment of the slide on the spindle the size of the pocket 37 for the reception of powdered material from the receptacle 3O can be readily varied to "accord? with different requirements.

is uppermost, as shown in Fig. 5, said-pocket will receive material from the receptacle, and thenby imparting a half-turn to the-spindle the pocket will be carried "to the loweriposi-i tion shown in Figs. 1 and Band will discharge its contents into the hopper 27, suitablestoppins-38 and 39,carried, respectively, iby the spindle 31- and tubular casing 30, serving to limit the rotative movement of the spindle.

It-will be noted-that the axis of thespindle 3l and :tubular casing 30 are'inclined'in respect to the horizontal, and that thepoeketl 37 isatfthe depressed end of ith-e-spindl-e,-so that the material will flow intoandfill said pocket-even whenthe latteris reducedzto its:

least dimension, a result which could :not'be so effectively attained if the axis of the spin-' dle 31 was horizontal.

In the operation of the device the powdered oizgranular charge is deposited in the-tubu lar mold 5 while the parts of the machine "are; in the position shown in Fig. '1that is to say, when the plunger-head 2 is retraetedto its full extentand the mold-head 3-is fuliyi projected. The lever 14 is: then operated-s0 as to project the plunger-head 2,-the mold-1 head retreating before it and the lever-24. rising until the parts assume the position shown in Fig. 2. The powdered or granular: mass is now confined in the mold between the movable plunger'4and the fixed plunger 6 and may be subjected'to any desired de-' gree of compression by movement ofthe re-' spective levers 14 and 24 in the direction of the arrowsshown in said- Fig. 2.

When the desired compression of the tablethas been effected, the plunger-heaclQis retracted by reversing the direction of movement of the lever 14, and there is also a re-i traction of the mold-head 3 until the parts assume the position-shown in Fig- 3, whereuponthe compressed tablet will be projected from :the mold by the action of the 'fixed plunger 6;

When it is desired to change the "character of the mold and plungers, the thumb screw 8. is loosened so as to release the stem 7 of the plunger 6, and the latter is then moved forward in the mold, so that the mold-head can be .swungup-ward, ELS ShO'WIl'lD Fig- 4, whereupon the plunger can be completely withdrawn from the mold, and the mold itself can be then removed upon slackening the thumb screw 40, whereby it is held in position in the head3,removal of the plunger 4 being effected by slackening the thumb-screw 41, which secures the stem of said plunger in the plunger-head 2. I

It will be observed that the fixed plunger 6 constitutes the guide torthe mold 5 and mold-head 3, while the horizontal guidance of the plunger-head 2 is effected by the baseplate land transverse roller 18, lateral guidan cc of said plunger-head being controlled by the set-screws'li). The roller 18 reduces the friction which might otherwise be due to up- Byturning the spindle 31 so that thepocket ward pressure exerted upon the head 2 by the cam 14 whenlth'e latter is moved soaa's to'project s-aid'head.

The only 1 parts of -''the machine requiring careful .machine workarethe mold and plungers, allot the other parts of the machine being capable ofbeiug fitted together without any further preparation than "the simple cleaning of the castings, the'boring out of the openings for the pivot-pins, and theithreadingot the openings :for the ESGlJ --screws, it having been the object of myinvention to produce at small expensean effective machine intended for the use of druggists in preparing prescriptions, such use being, in most cases, infrequent and onlyiforz-the treatment ofsmall' quantities: of material at a time, and

hence being :such as :to "render the employment of expensive machines inadvisable.

Having *thus described -my invention, I

claim, -and desire to se'cure'byLetters Patcutal. A tabletsm-achine'in which are combined a base orbed plate, fitLfiXGd plunger secured thereto, a-sliding'mold-head, a mold carried thereby and guided upon said fixed plunger,

asliding plunger-head, "an'd'a pair of handlevers, one for reciprocating the mold-head and the other for reciprocating the plungerhead substantially "asspecified.

2. A tablet-machine inwhichzare combined a base or bedplate, a'fixed plunger detachably-secured thereto, a tubular mold adapted to slide on said plunger, amoldi-head carrying the said mold and having proj ectingarms, I an: operating-lever anda pin through the medium of which the said lever is caused to act upon the arms of the mold-head, whereby the latter can onthe release of the fixed plunger be swung upward away from the base or bed plate, substantially as described.

3. A tablet-machine in which are combined a base or bed plate, a 'fixe'd plunger, a tubular moldguidedthereon, a mold-head carryi'ng said mold and having projecting arms, a hand lever engaging therewith and serving to impart movement to said mold-head, a plunger-head guided on said-'base-plate and carrying'a plunger, anda hand-lever having as specified.

a cam which acts on said plunger-head and serves to reciprocate the same, substantially at. A tablet-machine in which are combined a base-plate, a plunger-head supported there on, side guides Which do not Vertically confine the plunger-head, a cam-lever acting on said pl ringer-head to project the same, and a transverse roller, bearing on said head and serving to prevent the same from being lifted as it is projected, said roller being removable from its bearings in order to free the plungerhead, substantially as specified.

5. The combination in a feeding device for tablet-machines, of a receptacle having a tutwo subscribing Witnesses.

GEO. W. HUBER.

W'itnesses F. E. BECHTOLD, Jos. H. KLEIN. 

